Fluid-pressure-engine indicating apparatus and the like.



A. RYDER.

FLUID PRESSURE ENGINE INDICATING APPARATUS AND THE LIKE.

APPLICATION FILED JUNE 6.1917. 1,289,923. Patented Dec. 31,1918.

Y'SHEETS I.

A. RYDER.

FLUID PRESSURE ENGINE lNDICATlNG APPARATUS AND THE LIKE.

APPLICATiON FILED JUNE 6. I917- 1,289,923. Patented Dec. 31, 1918..

3 SHEETS-SHEET 2.

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A. RYDER.

FLUID PRESSURE ENGINE INDICATING APPARATUS AND THE LIKE.

Patented Dec. 1918.

3 SHEETS- 3.

Attys,

. ARTHURRYDEB, or HARTFORD, NORTHWICH, ENGLAND.

FLUID-PRESSUREQENGINE mnrca'rme APPARATUS AN THE LIKE.

To all whom itm'ay concern:

Be it known that I, ARTHUR RYDER, sub ject of the King of Great Britain, residing at Hartford, Northwi'ch, in the county of Chester, in the Kingdom of England, have invented certain new and useful Improvements 'in'and Relating to Fluid-Pressure Engine Indicating Apparatus and the like, of which the following is-aspecification.

The present invention relates to improvements in ind-icatingarrangements for fluid pressure englnes. a

. An object ofthe present invention is to provide. an indicating arrangement com-' bined witha fluid pressure engine so that. an

indicated diagram can be Obtained at any moment desired without stopping the en; gine, and on the other hand, the apparatus normally is isolated from the engine.

The invention is more particularly do scribed with reference to the accompanying drawings, inwhich:--'

Figure 1 is a diagrammatic view. of the arrangement,

. Fig. 2 is'a frontelevation'o'f part of the apparatus. v

Fig. 3 is a corresponding-plan View; and Figs. 4 and 5 are modified arrangements.

1 Fig.6 is a sectional elevation of a plug.

Fig. 7 is anoutsidesideview.

' On thecrank shaft 1 of' the engineor'on a shaft driven therebyat' equal speed, are keyed in correct phasewith the pistons of the fluid pressure engine the power of which is to be indicated, eccentric disks 2. These disks act as operative members to move the indicator element in synchronism with the reciprocating piston, the interconnection means being normally held out of their range.

' As shown in Figs. 1 to 3 the cam disks 2 operate on respective antifriction rollers 3 mounted at the end of pivoted arms 4 carried by trunnions 5 on a plate 6 on the side ofthe engine'crank; 'caseor other suitable place. ="The pivoted levers 4 aremade as long as possibleso that no; appreciative error is present by the passage of the roller center 3 through an arc instead of in a straight line passing through the center of the shaft 1. At the other end of the pivoted levers 4: connection means are provided'for thecords 7 or other means connected to the indicator- 8 mounted in a plug on the cylinders 9. 10. Itisnlaviousthatiniantlem;engiaestsuchies i v Specification of Letters Patent.

Patented Dec.31, 191s.

gApplication filed June 6, 1917. SerialNo.173,2 4

in I the particular instance illustratech a single pivoted levers may operate indica? tors or a-pairof cylinders 9,10. Similarly, a single lifting diskcan be used for more than one cylinder where the pistons of such cylinders are reciprocating in phase with one another.v The cord 7 passes over a quadrant 11 mounted on a pivot 12 and from. thence a further cord passes from quadrant 1-3 to a second indicator, If desired, the quadrants 11, 13, may be differential with respect to one another, By the-use of such quadrants it is'insured that the cord 7 is always moving at aspeed which has a constant function of'the speed of lift of the eccentrics 2.

Thecords 7. are detachably connected to the ends of the lever 4: by means of rings on their ends engaging'with hooks 14 adjust ably secured at the end of the arms 4: by

pins 15 passing through'one of a number r of perforations in the end of this arm.

Theroller 3 of each arm 4 will normally be held firmly incontact with its cam disk 2 by-means of a spring16 connected to'the arm 4; by means of a link- 17. The roller 1 I 3 is 1 normally held out of range of. the lift ing disk 2 by means of a catch 18' or any other equivalent device. It; will be seen therefore that by a simple releasing of the catch' 18 it would be possible immediately'to obtain an indicator diagramot the particular cylinder, the motion of the pistons of which corresponds'with the motion ofthe cam of the release lever. If all the catches 18 are released simultaneously it is possible to simultaneously obtain diagrams for all the cylinders of the engine.

To restore the arm 4: to its inoperative position it is suliicient to depress the Outer end until it comes into reach of the catch 18. In the case of a central lever or one similarly awkwardly placed, the lever may be provided with an operating handle 19.

. Similarly, any connecting cord 7 can be detached from its ho k It by drawing it. down by means'of a handle '20 upon it in the manner usual on indicating apparatus.

Inhigh speed enginesof course it'would be desirable that the parts such as the lever should-be balanced about their pivotal po nts, such as 5. i

To obtain extreme accuracv it' would, of: course, be desirable to connect the cord 7 to the end of the levers 4 bv means of ouad-. renfiSi butsyllhere .the lever: 4 is -.of consider.

able length relatively to the are described.

by the ends of the leverduring rotation of the crank shaft through one revolution, such refinement would not always be necessary.

In the modified arrangement shown in Fig. 4 the cam disks 2 act dire:tly on spring controlled plungers 21 normallyforced into contact with the surface of the lifting disks .2 by means of springs 22 and connect with cord 23 passing to the indicator and moving over guide pulleys such as 24. In such an arrangement'to hold the plunger21out of COIItZLtt with the cam 2 during normal running of theengine, a catch or hook 25 may be provided on a fiXed part of themachine. Any other suitable arrangement for this purpose however may be used. In the modified arrangement shown in Fig. 5 the plunger 21 is connected by a link 26 to a quadrant 27 pivoted at 28 to a fixed part of the machine, such as the crankcase, which cord of the indicator.

quadrant'is connected at one end 29 tothe By this means it is possible to obtain accurate rettilineardi'splacement of the cord 30 so that this is'mov' ing constantly with the velocity'which is a constant function of'the velocity of the pis ton, the movement of which it is reproducing.

An improved plug for the reception of an. indi'ator to be mounted upon the cylinder of a fluid pressure engine is used whlch per- 3 mits of (ommunication being made at will between the interior of the cylinder and the indicator without stopping the engine, and which can remain as a permanent fixture upon the engine. a The device consists of a plug 31 adapted to be permanentlyscrewed into a hole in the cylinder 32, or in the arrangement shown secured to the cylinder by means of a flange upon it and studs. The plug 31' is provided .with a seating 33 which is closed by the valve end 34 of a spindle 35 passing through the outer end of the plug 31 and having a portion 36 at its outer end in threaded engagement therewith. The spindle 35 passes down an axial hole 37 in the plug communieating with a side passage 38 having a threaded end 39 to re eive the indicator.

The spindle 36 can be moved axially along the passage 37 by turning it by means of the bolt head 40 so that the valve 34 leaves the seating 33 and permits of free passage between the passageway 38 and the interior of the cylinder through the passagej 37. 'A' lock nut 41 is carried by the threaded end 36 of the spindle 35 to secure this in any desired position. A bracket 42 is preferably mounted on the plug 31 and it may consist in a simple form of a piece of bent metalsecured by the studs holding the plug 31011 to the cylinder 32 and having a portion 43 extending above the head 40 of thespin'dle 35 to firstly act as an, indicator for the position of the stud 40,

ing the spindle 40 so that the part 34 leaves 1 the valve seat 33. On the compression and firing strokes of the engine the passage'37 of theplug 31 is filled with gas under pressure, but on the induction stroke of themgine, the valve 47 will automatically open =2:

and air entering .will clear all accumulations of gas burnt, unburnt, or burning, glowing particles or deposit from the passage 37, which is important to preventprematuro ignition. mounted on the end of the passage'44, to isolate passage completely from atmosphere but the preferred arrangement will be that in .which air is allowed to enter at certain times past the valve 47.; 5

The permanent tightness 'of the valve 34 is insured as after the diagram has been madethe spindle isrreturnedqupon' its seat 33 and the valve faces 33, 34 are notsubT If desired a cock 45 may be i jected to constantcorrosive action of gas or the like. Further no carbon depositorthe like will be formed on the valve faces or in the passage 37.

Further, as the plug 31 is detachable from the cylinder the seating 33 can be renewed at any time, in contradistinction to arrangements where the seating has been provided in the cylinder itself. i

Further, it will-be seen that while the plug is in position it is possible to remove the indicator screwed into the opening 39 and replace this by another, also adjustments and replacements can be made to the shifting valve 46, 47. i

I declare that what I claim is 1. An indicating arrangement for multiple cylinder fluid pressure reciprocating en'- gines, having one ormore pairs of pistons reciprocating in phase, comprising elements directly on and moving in phase with and common to said pairsof pistons. permanent driving connections between said elements and the crank shaft of said engine, one or more pairs of indicators mounted on respective cylinders adapted to beoperated'by said elements, and means to interrupt the connections between said indicators and said elements to leave the latter the sole constantly moving parts. V

2. An indicating arrangement for'flnid pressure engines, comprising a plugdetachably mounted on the cylinder and adapted to carry the indicator, which plug has a passageway communicating with the indicator and with the interior of the cylinder, and a threaded spindle valve mounted axially along the passage, so that this may be closed to fluid from the cylinder during times when the indicator is not in use, a bracket on the plug and an arm extending therefrom adjacent the end of the spindle to serve as an indicator for the position of the threaded spindle valve, and as a means to prevent undue movement of the'plug axially along the passage.

3. An indicating arrangement for fluid. pressure engines, comprising a detachable plug having a passageway communicating with the cylinder On which the plug is adapted to be permanently secured, and having side passages communicating with said passageway, an indicator on one of said side passageway, an automatic one-way valve on the other side passage to place this in communication with the atmosphere during certain times such as during the suction stroke of the engine, to clear away products of combustion and prevent premature ignition, a valve controlling the main passageway having the two side passages, and a handcontrolled cock controlling communication from the atmosphere to the outside of said automatic valve.

4. An indicating arrangement for fluid pressure reciprocating engines comprising a continuously rotating spindle, eccentric disks on said spindle. reciprocating in phase with each reciprocating piston, an indicator deviceoperated by said eccentrics mounted on each cylinder, and means to interrupt the connection between the indicator and the eccentric disks, leaving these eccentric disks the only part of the indicator on the engine which is moving.

5. An indicating arrangement for fluid pressure reciprocating engines, comprising a spindle rotating in phase with the main shaft of the engine, eccentric disks mounted on said spindle, reciprocating fingers mounted on the engine, a quadrant connected to each reciprocating finger, a cord connecting said quadrant and said indicator device, means to hold the finger in contact with the said eccentric disks, and a catch to lock the fingers out of range of the eccentric disks. thereby interrupting the connection between the indicator and the eccentric disk, leaving this latter part on the engine alone moving.

6. An indicating arrangement for fluid pressure engines, comprising a plug, de-

tachably mounted on the cylinder and adapted to carry the indicator, a valve closing a passage-way in said plug communicating with the indicator and preserving with the lower face of the plug a surface of the cylinder whereby the compression value in the cylinder is maintained constant whether the plug is mounted on the engine or not.

7. An indicating arrangement for fluid pressure engines comprising a plug detachably mounted on the cylinder, adapted to carry the indicator, having a passageway in it connecting the cylinder with the indicator, and a valve controlling said passageway but adapted to present with the remaining portion of the plug when in position on the cylinder, a surface flush with the normal internal surface of the cylinder whereby the compress on value in the cylinder remains at its predetermined value during those times when the indicator is not in user 8. An indicating arrangement for fluid pressure engines comprising a plug detachably mounted on the cylinder, adapted to carry the indicator, having a passage-way in it connecting the cylinder with the indicator, and a threaded spindle valve receding along its end axis controlling said passageway but adapted to present with the remaining portion of the plug when in position on the cylinder. at surface flush with the normal internal surface of the cylinder, whereby the compression value in the cylinder remains at its predetermined value during those times when the indicator is not in use.

9. An indicating arrangement for fluid pressure engines, comprising a plug detachably mounted on the cylinder, adapted to carry the indicator, having a passageway in it connecting the cylinder with the indicator, a threaded spindle valve opening inward away from the cylinder, controlling said passage-way but adapted to present with the remaining portion of the plugs when in position on the cylinder a surface flush with the normal internal surface of the cylinder, whereby the compression value in the cylinder remains at its predetermined value during those times when the indicator is not in use.

In witness whereof. I have hereunto signed my name this 19th day of April 1917, in the presence of two subscribing witnesses.

ARTHUR RYDER.

Witnesses ERNALD S. MosELnY. MARION E. CLOUD.

Copies of this patent may be obtained for five cents each. by addressing the Commissioner of Patents, Washington, D. 0." 

